At 1:32 PM -0400 3/12/2012, Illirik Smirnov wrote:
I'm considering oil-cooling my DP 2.5 PMG5.
http://www.everymac.com/systems/apple/powermac_g5/stats/powermac_g5_2.5_dp.html
This would involve putting the computer (sans ports, hdd, cd) in a
tub of mineral oil. It doesn't conduct electricity, and as such
would be perfect for this use. It has been done many times with PCs;
does anyone know anything that may keep the G5 from working
optimally?
hum. wow. I've heard of this being done but have never seen it.
Intriguing idea. Personally, I'd never do it... At some point, I'd
have to go in there to fix or add something and I cannot abide by
oily slimy things! blech! lol
Are you experiencing any particular issue with your Power Mac that
has led you to this?
If the heat transfer is really good, it might make for some
overclocking opportunities! Can a Power Mac G5 be overclocked?
I know that the liquid cooled G5 bricks are known to have problems as
they get older. I'm thinking going whole-system oil cooled like this
might maybe be a solution ... depending on how the leaking liquid
coolant mixes with the mineral oil. OTGH, it might be better to oil
an air-cooled G5.
Extending the USB and FW to the top of the tank should be easy. I
wouldn't bother with the SATA interface until you got everything else
working. Booting off the 800 Mbps Firewire2 instead of 1.5G SATA is
good enough for testing.
Most PCs are fairly open in their design. Slap in a few fans, and
there's good air flow. But the Power Mac G5 is tightly
compartmentalized. I wonder if the fluid flow will still be ok?
It's not enough that fluid flows. It has to actually circulate to
the radiator system. Otherwise, the oil will happily distribute the
heat evenly through that compartment, making it hotter and hotter.
I've never gutted a PM G5. Are there any dust filters in there?
I would check any/all parts for labels and such. Puget Systems has a
FAQ that mentions the oil dissolved the gum, loosening the labels.
http://www.pugetsystems.com/submerged.php
Do you have/need the G5 service / take-apart manuals?
An interesting project... If you do this, please keep us in the
loop! I'd love to know how it goes!
At 12:45 AM +0100 3/15/2012, Valter Prahlad wrote:
I'm doubtful about the power supply fan, though, and I'm very
skeptical about immersing the HD in oil: it isn't designed to work
in oil, and the very strict tolerances might lead to trouble.
(unless it's leak-proof; but on HDs I always noticed a tiny hole you
must not cover, so it's not sealed)
Puget Systems had no problem with the fans. They didn't dip the HDs
- those are mounted in the tank's top.
At 11:37 PM -0400 3/14/2012, W.Adrian D'Alessio wrote:
Don't go for the bubbles though it will reduce heat transfer. Or is
that important? Or is it really about having a showy conversation
piece?
Their example had too many bubbles, I think. But geeze - ya gotta have some!
And maybe one of those USB powered swimming fishies!!!!!
I donno. The more I think about it the more cool this project seems. lol
- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.
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